EP0976434A1 - Separator für nicht mischbare Flüssigkeiten - Google Patents

Separator für nicht mischbare Flüssigkeiten Download PDF

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Publication number
EP0976434A1
EP0976434A1 EP99420167A EP99420167A EP0976434A1 EP 0976434 A1 EP0976434 A1 EP 0976434A1 EP 99420167 A EP99420167 A EP 99420167A EP 99420167 A EP99420167 A EP 99420167A EP 0976434 A1 EP0976434 A1 EP 0976434A1
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EP
European Patent Office
Prior art keywords
fluid
separator
treated
vertical
immiscible liquids
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99420167A
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English (en)
French (fr)
Other versions
EP0976434B1 (de
Inventor
Georges Ceresoli
Roger Gilbert
Yves Guibert
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Individual
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Individual
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Publication of EP0976434A1 publication Critical patent/EP0976434A1/de
Application granted granted Critical
Publication of EP0976434B1 publication Critical patent/EP0976434B1/de
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases

Definitions

  • the present invention relates to a device for separating immiscible liquids of different densities, especially with extraction of the lightest liquid, and recycling in the closed circuit of the most liquid heavy.
  • the invention can be applied to the separation of liquid phases consisting of hydrocarbons and water, organic phases and water, or all immiscible liquids, this in various industrial fields, including including the food industry.
  • the present invention provides a separator whose operation is based on obtaining a flow one-dimensional, the turbulence being minimized, the device proposed being based only on fluid mechanics, and not presenting no moving separating device, except the means of circulation of the fluid to be treated.
  • the invention relates to a liquid separator immiscible which essentially comprises a cylindrical main body, vertical axis, in which is disposed a vertical central tube, starting from the top of said body and extending to its base, where it connects to a horizontal grid, joined with the side wall of the body, while vertical plunging tubes are arranged in the volume annular delimited between the central tube and the side wall of the body, each vertical dip tube extending down to a level intermediate, above the grid, the top of the central pipe being connected to means for supplying the fluid to be treated, the vertices of the vertical dip tubes being connected to means evacuation or recycling of the treated fluid, and the upper part of the volume annular being connected to means for evacuating the light phase extracted.
  • An apparatus for separating non-liquid liquids is thus produced. miscible, continuous operation, operation based on fluid mechanics, without moving separating parts, and does not using in particular neither centrifugation nor filtration membrane, neither to coalescence, nor to decantation by static gravity (which is a long and bulky operation), or the use of products chemicals such as coagulators or flocculators.
  • the principle of separation is as follows: a first increase in the size of the micelles of the the lightest fluid is obtained when passing through the means supply, as well as in the descent of the fluid through the central tube of the main body.
  • the fluid collapses from bottom to top in the annular volume, with the formation of a turbulence zone above the lower ends of the tubes dipping, which is accompanied by a new magnification of the micelles, which gather in the upper part of the main body.
  • the main body cylindrical has, at its top, an intake head to which are connected the tops of a plurality of vertical dip tubes, distributed around the central tube, and which serve to collect the fluid treaty.
  • the means for supplying the fluid to be treated, connected to the top of central tubing of main body, may include pumping means, withdrawing the fluid to be treated contained in a tank or storage tank.
  • the vertices of the vertical tubes plungers can be connected, via the head inlet, to a discharge pipe returning to the tank or to the storage tank, for recycling of treated fluid, in circuit "closed".
  • the lightest part should not be saturated with the lightest fluid.
  • high of the main cylindrical body of the separator indeed, the mass of light extracted fluid increases during treatment and this mass does not must in no case approach the lower ends of the tubes plungers, dedicated to the evacuation of the treated liquid.
  • the upper part of the volume annular, delimited between the central tube and the side wall of the body main is connected to an annex compartment, located in the upper part of the separator, a draw-off pipe leaving said compartment Annex.
  • air purge means are provided in the upper part of the annex compartment, or at the start of the racking, if it is necessary to evacuate absorbed air in the tank or the storage tank, from which the fluid to be treated is drawn.
  • the separator object of the invention accepts liquid pumped at any level of the tank or storage tank, without no concentration constraint on either of the fluids to to separate.
  • the means of fluid supply to be treated include, advantageously, a suction strainer, floating on the surface of the fluid to be treated contained in the storage tank or tank, the suction strainer comprising a manifold connected to an intake pipe, directed towards the main body.
  • the strainer manifold in its lower part has at least one opening for the inlet of the fluid to be treated, and it contains a vertical suction tube, preferably vertically adjustable, the lower end of which is connected to the intake pipe, the manifold externally carrying means for fixing, preferably adjustable for floats. Entrance ports of the manifold limit the introduction of air into the separator, especially in the event of air absorption by turbulence often encountered in storage tanks, when the fluid to be treated is in use in an external system.
  • the separator of immiscible liquids includes a storage tank 1 receiving a fluid to be treated 2, which reaches a certain level in tank 1 3.
  • the supply of the device itself, from the storage tank 1, is done here by through a pump 4, made up of elements adapted to the environment liquid to be conveyed.
  • the inlet of pump 4 is connected by a flexible hose intake 5, to a suction strainer 6 (detailed below), floating at the surface of the fluid to be treated 2.
  • the outlet of the pump 4 is connected, by an ascending intake manifold 7, to an intake head 8 located at top of a cylindrical main body 9, of vertical axis 10, the figure of which 2 gives a horizontal section at an intermediate level.
  • a vertical central tube 11 Inside the body 9 of the device, along the vertical axis 10, is arranged a vertical central tube 11, starting from the head 8 and extending the intake 7 to the part lower body 9. At its base, the central tube 11 is connected to a horizontal annular grid 12, contiguous with the side wall 13 of the body 9, and located at a low height above the bottom 14 of this body.
  • the annular grid 12 has suitable openings 15, the shape of which and the layout are shown as an example in Figure 2.
  • each tube 16 starts from the head intake 8, and extends down to a certain level intermediate, located at a certain height h above the grid 12.
  • the upper part of the body 9 communicates, by a tube angled 17, with an annex compartment 18 located in the upper part of the device.
  • a withdrawal duct 19 starts from the top of the compartment appendix 18, a valve 20 being arranged on this conduit 19.
  • air purge members 22 and 23 can be arranged on the intake head 8 and at the start of the duct withdrawal 19, while a drain member 24 can be placed on the bottom 14 of body 9.
  • This preliminary operation is carried out during the transfer of the fluid to be treated 2, from the storage tank 1 to the lower part of the body 9, passing through the intake pipe 5, the pump 6, the intake manifold 7 and the central pipe 11.
  • the walls of the hydraulic circuit in its together, and in particular the aforementioned tubes, consist of "smooth" materials, in order to reduce as much as possible the roughness which generate turbulence harmful to the separation of liquids.
  • the fluid On its intake path between the storage tank 1 and the base of body 9, the fluid thus has a distribution of speeds, in the notably circular section of the pipes, which starts from a zero value against the wall, to pass through a maximum of turbulence in the center of the section, therefore on the axis of the tube, place where the gathering of the micelles actually occurs (knowing that the turbulent regime does not take birth upon entry of the tube, where the flow is still laminar, but only after a certain course, called "length of establishment of the turbulent regime ").
  • the axis of the pipes is therefore the place where the first magnification of the micelles.
  • the fluid flows from bottom to top the annular grid 12, the openings 15 are studied to avoid the dislocation of the large micelles formed in upstream.
  • the fluid then begins, inside the annular volume 25 delimited between the central pipe 11 and the side wall 13 of the body 9, a path upward with "one-dimensional" flow, that is to say a flow where all the fluid threads are parallel, to each other, and constant in any cross section.
  • the section is much larger than that of the intake manifold 7, the speed distribution law mentioned above still applies, but with a much flatter turbulence curve in the center of the section.
  • the fluid treated that is to say the fluid whose phase most light has been eliminated, drains through the vertical dip tubes 16, of which the inlet ports are located above the turbulence zone.
  • the dynamic allows the separated light fluid to continue its journey ascending, in the annular volume 25, towards the upper part of the body 9 of the separator, thus leaving a "heavy" fluid, free of light phase, evacuate to the storage tank 1 by successively traversing the vertical plunging tubes 16, the intake head 8 and the manifold refoulement 21.
  • the light fluid is thus "trapped" in the upper part of the body 9 of the separator and from there it passes through the bent tube 17, from diameter suitable for the transfer of the supernatant liquid (depending on the viscosity of the light fluid to be removed) to the annex compartment 18.
  • the air purge member 23, which operates automatically, here makes it possible to take into account the presence of surface turbulence, involving a air absorption, in the storage tank 1 from which the fluid to be treated 2.
  • the light fluid can be withdrawn manually or automatically, via line 19, according to the degree of automation desired by the user.
  • the separation cycle is established so permanent and continuous, when the device remains in operation.
  • the suction strainer 6 clearly visible in Figures 3 and 4 to which we will now refer, allows the extraction of the fluid to be treated 2 practically at level 3, so as to prioritize pumping the layer supernatant.
  • the strainer 6 comprises a cylindrical central manifold 26, of vertical axis, provided externally with a collar 27, which carries in two diametrically opposite points of the adjustable fasteners for floats 28.
  • the floats 28, a total of four, are grouped by pairs, the two floats 28 of each pair being connected by a cross member horizontal 29, provided in the middle with a fixing 30, adjustable vertically, which connects it to the collar 27.
  • the manifold 26 of the strainer 6 has, in its lower part, at least one lateral orifice 31 allowing the entry of the fluid to be treated 2, and the maintaining a constant fluid level in this manifold 26, while minimizing the introduction of air.
  • a vertical suction tube 32 externally threaded, which is screwed into a complementary threaded ferrule 33 forming the bottom of the manifold 26.
  • a clamping ring 34 is still screwed on the part bottom of the suction tube 32, and pressed against the ferrule 33.
  • the flexible inlet pipe 5 which plunges into the tank storage 1, has a tip 35 which is screwed on the end bottom of the suction tube 32.
  • the suction strainer 6, floating on the fluid to be treated 2 thanks to its floats 28, is connected to the flexible inlet pipe 5 which, depending on its length and flexibility, allows the device to operate for a variable level 3, within certain limits.
  • Adjustment vertical fasteners 30 of floats 28, as well as suction tube 32 more or less screwed into the shell 33, allows to adjust the position of the upper end of the suction tube 32 relative to level 3 of the fluid to be treated 2, thereby sucking the surface layer over the thickness desired.
  • floats 28, deployed towards the outside of the connecting crosspieces 29 in the position illustrated in the drawing can be also folded inwards, for reasons of space.
  • the separator object of the invention allows recovery and reuse of the two liquid phases separate, or at least one of these phases, unlike destruction processes which, moreover, generate either pollution environmental, ie a high cost of destruction.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Water Treatments (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Removal Of Floating Material (AREA)
EP99420167A 1998-07-28 1999-07-19 Separator für nicht mischbare Flüssigkeiten Expired - Lifetime EP0976434B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9809805A FR2781688B1 (fr) 1998-07-28 1998-07-28 Separateur de liquides non miscibles
FR9809805 1998-07-28

Publications (2)

Publication Number Publication Date
EP0976434A1 true EP0976434A1 (de) 2000-02-02
EP0976434B1 EP0976434B1 (de) 2005-03-02

Family

ID=9529230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99420167A Expired - Lifetime EP0976434B1 (de) 1998-07-28 1999-07-19 Separator für nicht mischbare Flüssigkeiten

Country Status (4)

Country Link
EP (1) EP0976434B1 (de)
AT (1) ATE289848T1 (de)
DE (1) DE69923888D1 (de)
FR (1) FR2781688B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1787814A3 (de) * 2005-11-19 2009-10-21 Technotrans AG Reinigungsvorrichtung für das Feuchtmittel einer Offset-Druckmaschine
CN105087056A (zh) * 2014-05-15 2015-11-25 中石化洛阳工程有限公司 一种三相分离器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704667A1 (fr) 2011-03-18 2012-09-28 Hoppal R & D Sa Séparateur de liquides non miscibles.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8901623U1 (de) * 1989-02-13 1989-08-31 Bär + Co. Anlagentechnik GmbH, 7760 Radolfzell Vorrichtung zum Absaugen, Trennen und Entsorgen einer aufschwimmenden Substanz
EP0508814A1 (de) * 1991-04-10 1992-10-14 VALIANT MACHINE & TOOL INC. Vorrichtung zur Abscheidung von Kohlenwasserstoffprodukten aus Wasser
WO1995003868A1 (en) * 1993-08-02 1995-02-09 Kvaerner Paladon Limited Apparatus for separating aqueous phase from a mixture of hydrocarbon and aqueous fluids
WO1997032087A1 (en) * 1996-03-01 1997-09-04 Alfa Laval Ab A device for skimming a surface layer of a liquid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8901623U1 (de) * 1989-02-13 1989-08-31 Bär + Co. Anlagentechnik GmbH, 7760 Radolfzell Vorrichtung zum Absaugen, Trennen und Entsorgen einer aufschwimmenden Substanz
EP0508814A1 (de) * 1991-04-10 1992-10-14 VALIANT MACHINE & TOOL INC. Vorrichtung zur Abscheidung von Kohlenwasserstoffprodukten aus Wasser
WO1995003868A1 (en) * 1993-08-02 1995-02-09 Kvaerner Paladon Limited Apparatus for separating aqueous phase from a mixture of hydrocarbon and aqueous fluids
WO1997032087A1 (en) * 1996-03-01 1997-09-04 Alfa Laval Ab A device for skimming a surface layer of a liquid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1787814A3 (de) * 2005-11-19 2009-10-21 Technotrans AG Reinigungsvorrichtung für das Feuchtmittel einer Offset-Druckmaschine
CN105087056A (zh) * 2014-05-15 2015-11-25 中石化洛阳工程有限公司 一种三相分离器
CN105087056B (zh) * 2014-05-15 2017-01-11 中石化洛阳工程有限公司 一种三相分离器

Also Published As

Publication number Publication date
EP0976434B1 (de) 2005-03-02
FR2781688B1 (fr) 2000-09-29
ATE289848T1 (de) 2005-03-15
FR2781688A1 (fr) 2000-02-04
DE69923888D1 (de) 2005-04-07

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